<html>
  <head>
    <title>Melody example: chatting</title>
  </head>

  <style>
    #chat {
      text-align: left;
      background: #f1f1f1;
      width: 500px;
      min-height: 300px;
      padding: 20px;
    }
  </style>

  <body>
    <center>
      <h3>Chat</h3>
      <pre id="chat"></pre>
      <input placeholder="say something" id="text" type="text">
    </center>

    <script>
      var url = "ws://" + window.location.host + "/ws";
      var ws = new WebSocket(url);
      var name = "Guest" + Math.floor(Math.random() * 1000);

      var chat = document.getElementById("chat");
      var text = document.getElementById("text");

      var now = function () {
        var iso = new Date().toISOString();
        return iso.split("T")[1].split(".")[0];
      };

      ws.onmessage = function (msg) {
        var line =  now() + " " + msg.data + "\n";
        chat.innerText += line;
      };

      text.onkeydown = function (e) {
        if (e.keyCode === 13 && text.value !== "") {
          ws.send("<" + name + "> " + text.value);
          text.value = "";
        }
      };

    </script>
  </body>
</html>
